Source: PL-WRu I F 413 Cistercian Gradual (Silesia)Folio: 056rSequence: 4Feast: Fer. 4 Maj. Hebd.Office: MASSGenre: TrVPosition: 04Cantus ID: g00876dMode: 2TFull text: Percussus sum sicut fenum et aruit cor meum quia oblitus sum manducare panem meum